OK you need to know doing anything to do with CLI befuddles me totally.
But I typed in those commands you suggested and hit enter.
I tried Iusb and iusb and got "command not found"

Then for dmesg I got this VAST list of stuff (I had been surfing for two hours)
so I don't know what to look for on this.
Down at the bottom of this list I saw one line
Linux video capture interface V2.00
What Am I looking for?